Dear Sir,
The DEVCONFIG[UNLATCHED_FAULT] bit, when set, prevents the latching of fault bits in the followingregisters:
• FAULT_OV—Overvoltage VSENSE ADC limit exceeded
• FAULT_2OV—Overvoltage VSENSE secondary protection comparator limit exceeded
We set [UNLATCHED_FAULT] bit to try FAULT_OV and FAULT_2OV in our board.
Our cell voltage is about 3.3V
for FAULT_OV
1.Set CELL_OV 0x90–91 (144–145) Cell Overvoltage Threshold as 0x6148 = 1.9V
2.Found FAULT_N signal from high to low
3.Set CELL_OV 0x90–91 (144–145) Cell Overvoltage Threshold as 0xD1EC = 4.1V
4.Found FAULT_N signal from low to high
for FAULT_2OV
1.Set COMP_OV 0x8D (141) Comparator Overvoltage Threshold as 0x50 = 3V
2.Found FAULT_N signal from high to low
3.Set COMP_OV 0x8D (141) Comparator Overvoltage Threshold as 0xFE= 5.175V
4.Found FAULT_N signal is still low
5.Set FAULT_SUM 0x52–53 (82–83) Fault Summary as 0xFFC0 to clear FAULT
6.Found FAULT_N signal from low to high
Could you please help us to explain why we must clear fault for FAULT_2OV, but we don't need to clear fault for FAULT_OV?
Thanks!!
Wawafish
